Crimping-machine for boots and shoes



3 Sheets-Sheet 1.

(No Modl.)

' J. W. D. PIFIELD.

Crimping Machine for Boots and Shoes.

Patented March 22,1881.

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N. PETERS. FHOTO-LI'IMOGRAPNER, WASHINGTON. D c.

(No Model.) asneets-snefi 2. J. W D. FIFIELD Crimping Machine for Bootsand-Shoes.

No. 239,039. Patented March 22,1881;

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{No Model.) I 3 Sheets-Sheet 3.

J. W. D. FIPIELD. GrimpingMa ohine f0r-Boots and Shoes.

No. 239,039. Patented M afch 22,1881.

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N-PITIERS PHDTO LITNDGRAPHER, WASHINGYON, D. O.

UNITED STATES PATENT OFFICE.

JOHN W. D. FIFIELT), OF NORTH BROOKFIELD, MASSACHUSETTS.

CRlMPlNG-MACHINE FOR BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 239,039, dated March22, 1881, Application filed January '28, 1881. (No model.)

To all whom "it may concern.-

' Beitknown that I, JOHN W. D. FIFIELD, of North Brooktield, county ofWorcester, State of Massachusetts, have invented Improvements inCrimping-Machines for Boots and Shoes, of which the followingdescription, in connection with the accompanying drawings, is aspecification.

This invention has for its object to improve the construction of thatclass of crimping-machines for boots and shoes wherein the forms areconnected with a rotary drum or carrier, which forms carry the bootfront or vamp between jaws.

In this my improved machine the rotary form-carrier, sustained in properbearings, is provided with an internal gear, which is engaged and drivenby one or more toothed wheels, preferably two, at substantially oppositepoints, to thus equalize the strain of the parts and enable the drum tobe rotated with greater steadiness and uniformity.

The forms attached to the rotating drum carry or force the boot front orvamp between pivoted jaws mounted on independent pivoted jaw-carryinglevers acted upon at their rear ends by springs, preferably madeadjustable, whereby the position of the faces of the jaws or theirdistance apart may be regulated to thus adapt the jaws to the thicknessof the leather composing the boot or shoe and the pressure or amount ofstrain desired.

At the sides of the drum are independent clamp-carriers controlled bytreadles, and provided with clamps suitably shaped to descend upon theboot front or vamp resting on the upper ends of the jaws and hold thefront or vamp in proper central position with relation to the jaws whilethe form descends upon the said front or vamp and forces the samebetween the jaws, the form pulling the front or vamp from between theclamps and top of the jaws.

The pressure of the clamps may be varied more or less by any suitabledevice-such, for instance, as a treadle-the carrier for the clampbeinglocated and held in the position in which it is left by the treadleby a suitable locking device, herein shown as a pawl.

Figure 1 represents, in sideelevation, a crimping-machine embodying myimprovements;

Fig. 2, a top view thereof, the clamps being omitted. Fig. 3 is a frontelevation of Fig. 1 with the jaw-carrying levers in vertical section;and Fig. 4 is a sectional detail of the rotating drum, parts to move it,and theclampcarriers.

The frame-work is composed of standards A and annular side plates, a,held together centrally by the bolt a and nuts a The peripheries ofthese side plates, to, are notched or shouldered, as shown in Fig. 4, toreceive the rotating form-carrier b and clamp-carriers c d. Theform-carrier is made as an annulus or ring mounted on and guided betweenthe said pieces a, the said carrier having a series of teeth, I), (seeFig. 4,) to be engaged bya gear, b on a rotating shaft, b ,The shaft bhas on it a gear, I), which is engaged and driven by the pinion e,secured to the shaft 0, having thereon usual fastand loose pulleys toreceive the driving-belt for the machine. The rotation of the shaft 11and gear 72 will rotate the carrier b, and with it the connected formsf, any desired number of forms and of suitable shape being adjustablyattached thereto. I have shown but two forms, f, but in practice shallpreferably use six or more on each carrier b.

The carrier 11 might be rotated by one shaft, b and gear I)? but Iprefer to use two shafts and gears, so as to rotate the carrier moresteadily and uniformly, each gear engaging the in ternal gear of thecarrier at substantially diametrically opposite points. The second shaftfor this purpose is marked m, and its gear m the latter being shown,however, only by dotted lines in Figs. 1 and 3. On shaft m is a gear, malso engaged by the pinion e. The jaws 9, three pairs being hereinshown, are pivoted loosely at g on the levers g pivoted to the machinesidesa at 3, as shown in dotted lines, Fig. 1. At their rear ends thesejaw-carrying levers g are acted upon by spiral or other springs, h,(shown by dotted lines, Figs. 1 and 2.) These jaws and theircarrying-levers and springs are and will be substantially as in myUnited States Patent No. 229,989, July 13, 1880, or may be asin UnitedStates Patent No. 225,434, March 9, 1880, to which reference may be had,the said jaws adjusting them selves and the levers acting with more orless force according to the nature of the material being acted upon andthe extent to which it is desired to stretch the same.

The clamp-carriers c d, arranged at the sides of the carrier 1), areshown as flanged rings, adapted to rest on the frame a and free to turnthereon. These carriers are connected, by a link, 4, with a treadle orfoot-lever, 7c, to move the carrier in the direction of the arrowthereon, Fig. 1, to move the pivoted clamps p or 1 carried by the arms 8or t forward to clamp the edges of the boot front or vamp upon the upperedges of the jaws g, the under side of the said clamps or the upperedges of jaws being corrugated, as shown at 6 or 7. Each clamp-carrieris provided with teeth 8, engaged by detent 9, to hold the carrier inthe position in which it is left by the treadle, and by the saidtreadles the clamps may be made to press upon the boot front or vampwith greater or less force, as may be necessary, while the form f,acting against the central part of the front or vamp, is drawn frombetween the clamps and tops of the jaws as the form folds the front orvamp centrally and pushes or carries it between the jaws g.

By means of the corrugations 7 8 the leather of the front or vamp iskept from being twisted or turned aside out of proper shape, and byvarying the pressure of the clamps each side of the front or vamp may bestretched more or less.

To release the clamps it is only necessary to lift the pawls 9, when thesprings 12 will immediately turn the carriers 0 d to lift the clamps.

Instead of a foot-treadle and spring to op-v erate the clamp-carriers, Imight use a handwheel or crank and pinion to engage teeth on thecarriers and turn them the proper distances.

The lateral movement of the form-carrier is prevented by the shouldersof the frame parts a, and the carriers 0 d are held against lateralmovement by the same pieces a and the carrier b.

Wear between the frame a and carrier 1) resulting from the rotation ofthe said carrier may readily be compensated for by the bolt a.

I do not broadly claim a series of forms on a rotating carrier.

I am aware that a series of forms have been connected with an endlesschain and made to carry boot-fronts between jaws supported at threeplaces on hinged boards.

I claim- 1. In a crimping-machine, the rotating drum and two or moreforms secured thereto, com-' bined with the pivoted jaws 7 and thepivoted j aw-carryin g levers g adapted to vibrate about their pivots toadapt the jaws to leather of different thicknesses, all substantially asdescribed.

2. The rotating drum provided with the internal-ge-ar teeth I) and twoor more forms secured on the said drum, combined with the frame-work tosupport the said drum, one or more rotating shafts extended through thesaid drum and internal gear, and with gear to rotate the said carrierand its rigidly-attached forms, substantially as described.

3. The frame-worka, grooved and shouldered, as described, to sustain andguide the annular hollow drum or form-carrier, combined with theadjusting device or bolt extended through the hollow center of the drumand uniting the frame part, as and for the purpose described.

4. The frame-work a and rotating drum, combined with the independentannular clampcarriers 0d, guided and held in place between shoulders ofthe frame-work and the edges of the drum, substantially as described.

5. The frame work, clamp carriers, and clamps thereon, combined with thejaws to hold the front or vamp while it is being acted upon by the form,substantially as described.

6. The drivin g-shaft e, its pinion c, the gears b m shafts b m, andgear b m combined with the internally-toothed form-carrier andframe-work ato support and guide it, the said gears b m engaging theinternal gear at opposite sides the center of rotation of the saidcarrier, substantially as described.

In testimony whereof Ihave signed m y name to this specification in thepresence of two subscribing witnesses.

JOHN W. D. FIFIELD.

Witnesses:

G. W. GREGORY, W. H. SIGSTON.

